The planned design for The Line in Neom.NeomNeom planners are worried about The Line as costs skyrocket, The Wall Street Journal reported.Planners are reportedly concerned the horizontal skyscraper's design might not appeal to some people.The first 1.5 miles of the megaproject could cost more than $100 billion.The cost of Saudi Arabia's Neom project seems to be spiraling — and that's not the only issue concerning planners.According to The Wall Street Journal, they're concerned that The Line's vertical city concept will not appeal to some potential residents, given the levels of natural light likely to reach the lower levels of the parallel structures.They will be about 1,640 feet high — not far off the World Trade Center in New York City, which is 1,776 feet.